[PATCH v6 06/24] soc: qcom: cmd-db: adjust probe for U-Boot

[Simon Glass]

Hi Caleb,

On Tue, 16 Jul 2024 at 08:16, Caleb Connolly <caleb.connolly at linaro.org> wrote:
>
>
>
> On 16/07/2024 09:04, Simon Glass wrote:
> > Hi Caleb,
> >
> > On Mon, 15 Jul 2024 at 22:42, Caleb Connolly <caleb.connolly at linaro.org> wrote:
> >>
> >>
> >>
> >> On 15/07/2024 13:39, Simon Glass wrote:
> >>> On Mon, 15 Jul 2024 at 11:08, Caleb Connolly <caleb.connolly at linaro.org> wrote:
> >>>>
> >>>> Integrate cmd-db into the U-Boot driver model.
> >>>>
> >>>> This is just a wrapper around an in-memory database, so we just need to
> >>>> get the address and validate that cmd-db is there.
> >>>>
> >>>> Since cmd_db_header will be stored in the .data section we can skip
> >>>> bind if it's already set.
> >>>>
> >>>> Signed-off-by: Caleb Connolly <caleb.connolly at linaro.org>
> >>>> ---
> >>>> To: Simon Glass <sjg at chromium.org>
> >>>> ---
> >>>>    drivers/soc/qcom/cmd-db.c | 72 +++++++++++++++--------------------------------
> >>>>    include/soc/qcom/cmd-db.h |  3 --
> >>>>    2 files changed, 23 insertions(+), 52 deletions(-)
> >>>>
> >>>
> >>> Reviewed-by: Simon Glass <sjg at chromium.org>
> >>
> >> Thanks
> >>>
> >>> BTW, this is a MISC driver. Does it implement the read() operation?
> >>
> >> No, the API (as defined in the header file) takes a string and returns a
> >> database entry. cmd-db users don't have an easily available handle to
> >> the node / udevice regardless.
> >
> > OK. The closest thing might be UCLASS_SYSINFO, but it is designed for
> > inside U-Boot and uses an int instead of a string for lookup.
>
> Right, I don't think we'll be able to find a more optimum solution here.

OK

> >
> > Could you use the devicetree for this information? What sort of info is it?
>
> It maps resource names (e.g. "ldoa1" - the LDO1 regulator on PMIC A) to
> the address of the resource on the RPMh co-processor.
>
> We need to support existing (upstream) devicetree, since this has
> already been around for many years.

OK., Has this problem been resolved in more recent platforms?

Regards,
Simon